Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Evan Gelenn Dio Siau, MD

Individual provider Hospitalist Physician · NPI 1205217973

Evan Gelenn Dio Siau, MD is a Hospitalist in New York, New York. Qualified in 2012, 14 years ago. Practices with New York University, a 5,884-clinician group, works from 5 locations and accepts Medicare assignment. Licensed in New York.

Years since qualifying
14
Licensed in
NY
In the registry since
2015
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1ST Avenue At 16th St
New York, NY 10003
Phone: (212) 844-1808
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (4)

  • 4422 3rd Ave Bldg 3, Bronx, NY 10457-2545 — (718) 960-9000
  • 350 E 17th St, New York, NY 10003-3805 — (212) 420-4056
  • 281 1st Ave, New York, NY 10003-2925 — (212) 844-1808
  • 10 Union Sq E, New York, NY 10003-3314 — (212) 844-1808

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 299726 (NY)

Record details

NPI number1205217973
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 17, 2015
Last updated in NPPESAugust 4, 2023
Certification dateAugust 3, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHOSPITALIST
Medical schoolOTHER
Graduated 2012 (14 years in practice)
Group practice New York University — 5884 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations6 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients290
Services billed 839 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $125 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at New York University

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 5884 clinicians in the practice; 12 are shown here.

Other providers in New York